Lochinvar 51-211 Vertical direct venting continued, Vertical termination installation

Installation & Operation Manual

5 Vertical direct venting (continued)

Vertical termination – optional concentric vent

Description and usage

Lochinvar offers an optional concentric combustion air and vent pipe termination kit. Both combustion air and vent pipes must attach to the termination kit. The termination kit must terminate outside the structure and must be installed as shown in FIG. 5-4.

Field supplied pipe and fittings are required to complete the installation.

The required combustion air and vent pipe fittings are listed in Table 3D, on page 19 of this manual.

Vertical termination installation

1.See Section 5, Vertical Direct Venting - Determine Location (where applicable) (FIG. 5-1A).

Figure 5-4Concentric Vertical Termination

2.Cut one (1) hole (5 inch diameter for #CVK3003 installations or 4 inch diameter for #CVK3008 installations) into the structure to install the termination kit.

3.Partially assemble the concentric vent termination kit. Clean and cement following the cleaning procedures in these instructions.

a.Cement the Y concentric fitting to the larger diameter kit pipe (see FIG. 4-7, page 26).

b.Cement rain cap to the smaller diameter kit pipe (see FIG. 4-7, page 26).

NOTICE	Instead of cementing the smaller pipe to
	the rain cap, a field supplied stainless steel
	screw may be used to secure the two (2)
	components together when field disassembly
	is desired for cleaning (see FIG. 4-9, page
	27).

￿WARNING When using the alternate screw assembly method, drill a clearance hole in the rain

cap and a pilot hole in the vent pipe for the screw size being used. Failure to drill adequate holes may cause cracking of PVC components, allowing combustion products to be recirculated. Failure to follow this warning could result in personal injury or death.

Figure 5-5Do Not Install U-Bend to Rain Cap

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